The Resource Vault (Children's Society)

The Children's Society website is an absolute treasure-trove of information with just about everything young people need to know about emotional and mental health. Called the Resource Vault, the resources are organised by age group. Each entry has further links about where to find more information. 
Website: https://www.childrenssociety.org.uk/mental-health-advice-for-children-and-young-people/the-advice-resource-vault